Test1 kinda works in about 1 in 10 times on a boosted 50MHz 030 STE, CPU caches off. There are some glitches, could that be blitter issues? The 030 board is still in development so it could be an issue on hardware side as well. https://www.youtube.com/watch?v=kqaSq5BWu60 Wow, interesting results. T...

Test1 kinda works in about 1 in 10 times on a boosted 50MHz 030 STE, CPU caches off.There are some glitches, could that be blitter issues?The 030 board is still in development so it could be an issue on hardware side as well.

However, the reason to port this game to the Atari STE is to hope that the "best case" scenario in game is always less performance demanding than the "worst case". Keep in mind that the CPS1 CPU is almost completely busy handling the enemy "AI" even without having to c...

No good circuit will show you a 0ohm resistance on supply. Diagnose cart won't help if you have a short. If you have a high resolution multimeter and sharp probes you could narrow it down to a small area. That is what I did and it worked pretty well, there was a visible difference in resistance on s...

Might want to check decoupling capacitors.I once had a short on a decupling 100nF ceramic capacitor next to one of RAM chips, on Mega 1.Ceramic caps short sometimes when there is a physical force on the PCB - they might break inside.

I start with making database where we could type serial numbers (and additional) data about our Atari computers. Please take a look at: http://milan.kovac.cc/atari/chipmunk/ !!! and please note that there is no functionality so do NOT bother to type data !!! I will add tomorrow PHP code for databas...

Thanks for all the replies. With the 68020 in place with have no blitter or DMA issue (but there is no data cache on the 68020). I found 2 contradictory statements in the various things I read online. One says the all the ST RAM should be cacheable, and one says it shouldn't be because of the blitte...

I didn't do much anymore. I simply bridged 244 and 245 over, which just works fine ATM. I have the inline resistors, yes. Interesting is Atari changed the resistor values at some point in time, according to available schematic: 68R in STE and TT, 68R in MSTE REV2 schematic from April 1990 but then r...

No idea if this was brought to attention before? Atari ECO on DMA sound issues, mentions removing/shorting DMA clock (CPUCLKA) inline resistor R221 and removing C208, both near the Combel (C208 is underside the board.) This action also is a reason for a new PCB and schematic revisions, details in th...

What about removing (bridging) '245 and '244 buffers on data and control lines - can you check if it has any effect on corrupting drive with those 2 -38 DMAs?For my badly behaving STE, this actually seems the best fix I tried so far... still testing though...

By the way: It isn't the easiest job. A lot of the caps are soldered on to the main copper earth which makes them very difficult to remove. With enough heat, solder and flux you can do it safely. Just make sure you have good tools, a good station that you can adjust the temperature, some solder-abs...

Just a hint. Since you have TL866a/MiniPro software, you can use it to split the TOS image file (no need for this ROMSPLIT software). When loading, select: - for LO EPROM: Load Mode -> Load a high byte of a WORD(2 bytes) - for HI EPROM: Load Mode -> Load a low byte of a WORD(2 bytes) So you basicall...

By the way: It isn't the easiest job. A lot of the caps are soldered on to the main copper earth which makes them very difficult to remove. With enough heat, solder and flux you can do it safely. Just make sure you have good tools, a good station that you can adjust the temperature, some solder-abs...

14MB is nice! Depending on what is wrong with Conner drive, you might be able to at least try something to rescue data. I could "fix" my 64MB CP-2064 Conner that came with Falcon by opening it and helping (using a finger) heads to move out of the parking position. It then starts and all th...

We now have 32bit "fast" TOS 2.06 working in our board, with 0 wait states with 68020@32MHz on a STE: 32FT.png System is very quick and responsive now. Also blitter works fine, with read operations from fast TOS as well. Still the design has to be verified on machines with integrated Blitt...